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Framing visual roll-motion affects postural sway and the subjective visual vertical

Effects of visual roll-motion on postural sway and the subjective visual vertical (SVV) often is studied using mechanical devices, whereas electronic displays offer cheaper and more flexible alternatives. These devices typically emit and reflect light scattered by the edges of the screen, providing...

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Autores principales: Lubeck, Astrid J. A., Bos, Jelte E., Stins, John F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5110582/
https://www.ncbi.nlm.nih.gov/pubmed/27363414
http://dx.doi.org/10.3758/s13414-016-1150-3
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author Lubeck, Astrid J. A.
Bos, Jelte E.
Stins, John F.
author_facet Lubeck, Astrid J. A.
Bos, Jelte E.
Stins, John F.
author_sort Lubeck, Astrid J. A.
collection PubMed
description Effects of visual roll-motion on postural sway and the subjective visual vertical (SVV) often is studied using mechanical devices, whereas electronic displays offer cheaper and more flexible alternatives. These devices typically emit and reflect light scattered by the edges of the screen, providing Earth-fixed cues of verticality. These cues may decrease the effects of rotating stimuli, a possibility that has not been studied explicitly before in one experimental design. We exposed 16 participants to a visual dot pattern, either stationary, or rotating in roll, that was or was not surrounded by a visible Earth-fixed reference frame. To eliminate unintended visual cues, the experiment was performed in complete darkness and participants wore neutral density goggles passing only 1% of light. Postural sway was measured using a force platform. SVV measurements were obtained from a visible rod. To monitor the participants, motion sickness severity was obtained with an 11-point rating scale. Results showed that the presence of an Earth-fixed frame significantly decreased the effect of the rotating pattern on postural sway and SVV deviations. Therefore, when studying subjective verticality related effects of visual stimuli, it is imperative that all visual Earth-fixed cues are not just minimized but completely eliminated. The observation that an Earth-fixed frame significantly decreased the effect of the rotating pattern on both postural sway and the SVV points towards a common neural origin, possibly involving a neural representation of verticality. Finally, we showed that an electronic screen can yield similar effect sizes as those taken from the literature using mechanical devices. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.3758/s13414-016-1150-3) contains supplementary material, which is available to authorized users.
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spelling pubmed-51105822016-11-29 Framing visual roll-motion affects postural sway and the subjective visual vertical Lubeck, Astrid J. A. Bos, Jelte E. Stins, John F. Atten Percept Psychophys Article Effects of visual roll-motion on postural sway and the subjective visual vertical (SVV) often is studied using mechanical devices, whereas electronic displays offer cheaper and more flexible alternatives. These devices typically emit and reflect light scattered by the edges of the screen, providing Earth-fixed cues of verticality. These cues may decrease the effects of rotating stimuli, a possibility that has not been studied explicitly before in one experimental design. We exposed 16 participants to a visual dot pattern, either stationary, or rotating in roll, that was or was not surrounded by a visible Earth-fixed reference frame. To eliminate unintended visual cues, the experiment was performed in complete darkness and participants wore neutral density goggles passing only 1% of light. Postural sway was measured using a force platform. SVV measurements were obtained from a visible rod. To monitor the participants, motion sickness severity was obtained with an 11-point rating scale. Results showed that the presence of an Earth-fixed frame significantly decreased the effect of the rotating pattern on postural sway and SVV deviations. Therefore, when studying subjective verticality related effects of visual stimuli, it is imperative that all visual Earth-fixed cues are not just minimized but completely eliminated. The observation that an Earth-fixed frame significantly decreased the effect of the rotating pattern on both postural sway and the SVV points towards a common neural origin, possibly involving a neural representation of verticality. Finally, we showed that an electronic screen can yield similar effect sizes as those taken from the literature using mechanical devices. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.3758/s13414-016-1150-3) contains supplementary material, which is available to authorized users. Springer US 2016-06-30 2016 /pmc/articles/PMC5110582/ /pubmed/27363414 http://dx.doi.org/10.3758/s13414-016-1150-3 Text en © The Author(s) 2016 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Article
Lubeck, Astrid J. A.
Bos, Jelte E.
Stins, John F.
Framing visual roll-motion affects postural sway and the subjective visual vertical
title Framing visual roll-motion affects postural sway and the subjective visual vertical
title_full Framing visual roll-motion affects postural sway and the subjective visual vertical
title_fullStr Framing visual roll-motion affects postural sway and the subjective visual vertical
title_full_unstemmed Framing visual roll-motion affects postural sway and the subjective visual vertical
title_short Framing visual roll-motion affects postural sway and the subjective visual vertical
title_sort framing visual roll-motion affects postural sway and the subjective visual vertical
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5110582/
https://www.ncbi.nlm.nih.gov/pubmed/27363414
http://dx.doi.org/10.3758/s13414-016-1150-3
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